Product Name: B1 Grade Polyurethane Cold Storage Panel

B1 grade polyurethane (PU/PIR) cold storage panel (standard panel for cold rooms equipped with semi-embedded cold room doors + ceiling-mounted air coolers and V-type condensers)

Standards: GB8624-2012 (B1 flame retardant), JB/T6527-2006, T/CECS10276-2023

1. Structure (Sandwich Panel)

1.1 Facings (both sides)

Standard: 0.4–0.6mm color-coated galvanized steel sheet (PE polyester coating); for seafood/chemical rooms, choose 0.45–0.7mm 304 stainless steel; anti-corrosion option: embossed aluminum sheet.

Surface: flat or micro-ribbed profile to prevent bulging and enhance bonding strength.

1.2 Core material (B1 flame-retardant rigid polyurethane)

Two types available:

PU standard B1 polyurethane: density 40±2 kg/m³, closed cell ratio ≥97%, thermal conductivity ≤0.023–0.024 W/(m·K)

PIR modified B1 (for high-end pharmaceutical/GSP cold rooms): density 45–50 kg/m³, thermal conductivity ≤0.020 W/(m·K), superior flame retardancy and high-temperature resistance

1.3 Joint system: tongue-and-groove with built-in eccentric metal hooks, low-temperature sealant applied in grooves, thermal bridge-free design to prevent cold loss at seams (especially critical for wall panels around semi-embedded doors)

2. Key B1 Fire Performance Indicators (Mandatory for Acceptance)

B1 flame-retardant grade: oxygen index ≥30%, self-extinguishing within 3s after flame removal, no molten dripping (d0), low smoke toxicity (t0);

B2 and B3 flammable grades are strictly prohibited for formal cold room fire safety acceptance.

3. Common Thickness Selection (Based on Room Temperature, Matches Your Air Coolers)

4. Core Physical Parameters (National Standard)

Compressive strength: ≥160 kPa (premium PIR ≥220 kPa)

Water absorption: ≤4%, dimensional stability ≤3%

Service temperature: -40°C to +100°C, suitable for all temperature range cold rooms

5. Panel Classification & Application Scenarios

1. Color-coated steel (best cost-performance): standard meat, fruit & vegetable freezing rooms;

2. 304 stainless steel: seafood rooms, saltwater rooms, food processing areas, pharmaceutical cold rooms;

3. Aluminum sheet: high-humidity, highly corrosive storage rooms.

6. Advantages & Disadvantages

✅ Advantages

1. Excellent insulation, saves 25%+ energy compared to EPS panels, compatible with V-type condenser units to reduce condensing load;

2. B1 flame retardancy meets fire safety inspection requirements, pharmaceutical cold rooms pass GSP;

3. Quick assembly, dry installation on site, pre-cut openings for semi-embedded cold room doors.

❌ Disadvantages

1. Higher unit price than EPS panels of the same thickness; inferior B1 panels with added fillers may have insufficient density and false flame-retardant ratings.

7. Installation Points (Matching Semi-Embedded Doors)

1. Cut whole panels around the door opening to avoid small-piece joints that cause cold loss;

2. Install wall panels vertically, ceiling panels horizontally, apply double sealant lines on both sides of panel joints;

3. Pre-embed mounting brackets for air cooler suspension, and properly insulate and finish around panel openings.